The rabbit's long ears, which can be more than 10 cm (4 in) long, are probably an adaptation for detecting predators. They have large, powerful hind legs. The two front paws have 5 toes, the extra called the dewclaw.
However, Moorish idol larvae spend a long time drifting through the open ocean before they mature, so regional populations donât remain isolated enough to develop particular traits. Because of its beauty and its identity as a quintessential reef fish, the Moorish idol is a very popular fish in the aquarium trade.
Moorish Idols can come down with most saltwater fish diseases especially if you're having difficulty getting them to eat. Therefore, use of a quarantine tank with this fish is a must. Keep your Moorish Idol in quarantine for at least a few weeks, but at least as long as it takes for them to start eating.